NTSB Identification: CHI86FER01.
The docket is stored on NTSB microfiche number 31571.
Accident occurred Thursday, March 13, 1986 in WILLIAMS, MN
Aircraft: CESSNA 172H, registration: N3706R
Injuries: 1 Serious,3 Minor.
NTSB investigators either traveled in support of this investigation or conducted a significant amount of investigative work without any travel, and used data obtained from various sources to prepare this aircraft accident report.
THE PLT MADE A LOW PASS OVER A FROZEN, SNOW COVERED LAKE, THEN INTENDED TO MAKE A CLIMBING LEFT TURN. HE RPRTD THE WX & LIGHT CONDS AS 'SLIGHT HAZE, POOR HORIZON VISIBILITY, VERY WHITE OUT.' AS THE PLT CONTD WITH WHAT HE THOUGHT WAS A CLIMBING TURN, THE ACFT ENTERED A DSCNT & IMPACTED THE FROZEN LAKE. IN REFERENCE TO THIS ACCIDENT, THE PLT STATED THAT DURING HAZY CONDITIONS, SUNGLASSES THAT ARE LIGHTLY SHADED ON THE BOTTOM & DARK AT THE TOP CAN 'HELP CONFUSE THE HORIZON.'
The National Transportation Safety Board determines the probable cause(s) of this accident to be:CLEARANCE..MISJUDGED..PILOT IN COMMAND
The National Transportation Safety Board determines the probable cause(s) of this accident to be:DESCENT..INADVERTENT..PILOT IN COMMAND
TERRAIN CONDITION..SNOW COVERED
VISUAL/AURAL PERCEPTION..PILOT IN COMMAND
SPATIAL DISORIENTATION..PILOT IN COMMAND
LACK OF RECENT EXPERIENCE..PILOT IN COMMAND
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